<template>
<div>
  <div
      class="header"
  >
    <!-- 折叠按钮 -->
    <div class="collapse-btn" @click="collapsechage">
      <i v-if="!collapse" class="el-icon-s-fold"></i>
      <i v-else class="el-icon-s-unfold"></i>
    </div>
    <div class="user-name">
      <img  src="../assets/img/sd.jpg" />
    </div>
    <div class="logo">实践教学管理系统 </div>
    
    <div class="header-right">
    <div class="header-user-con">
      <!-- 全屏显示 -->
      <div class="btn-fullscreen" @click="handleFullScreen">
        <el-tooltip effect="dark" :content="fullscreen?`取消全屏`:`全屏`" placement="bottom">
          <i class="el-icon-rank"></i>
        </el-tooltip>
      </div>

      <!-- 用户头像 -->
      <div class="user-avator">
        <img src="../assets/img/img.jpg" />
      </div>
    
          <el-dropdown-item class="button"  command="logout" @click="logout()"><i class="el-icon-switch-button"></i>退出登录</el-dropdown-item>
    </div>
  </div>
</div>
</div>

</template>

<script>
import router from "../router";

import bus from 'vue3-eventbus'

export default {
  name: "Header",
  data() {
    return {

      collapse: false,
      fullscreen: false,
      name: 'linxin',
      message: 2
    };

  },

  methods:{
    handleCommand(command) {
      if (command == 'login') {
        localStorage.removeItem('ms_username');
        this.$router.push('/login');
      }
    },
    // 侧边栏折叠

    collapsechage() {
      this.collapse = !this.collapse;
      bus.emit('collapse', this.collapse);
    },

    logout() {
      sessionStorage.clear();
      this.$store.commit("logout");
      router.push("/login");
    },
    getTitle(title) {
      this.$store.commit("setRouterName", title);
      this.$emit("title", title);
    },

    handleFullScreen() {
      let element = document.documentElement;
      if (this.fullscreen) {
        if (document.exitFullscreen) {
          document.exitFullscreen();
        } else if (document.webkitCancelFullScreen) {
          document.webkitCancelFullScreen();
        } else if (document.mozCancelFullScreen) {
          document.mozCancelFullScreen();
        } else if (document.msExitFullscreen) {
          document.msExitFullscreen();
        }
      } else {
        if (element.requestFullscreen) {
          element.requestFullscreen();
        } else if (element.webkitRequestFullScreen) {
          element.webkitRequestFullScreen();
        } else if (element.mozRequestFullScreen) {
          element.mozRequestFullScreen();
        } else if (element.msRequestFullscreen) {
          // IE11
          element.msRequestFullscreen();
        }
      }
      this.fullscreen = !this.fullscreen;
    },
    mounted() {
      if (document.body.clientWidth < 1500) {
        this.collapsechage();
      }
    }

  }



}
</script>

<style scoped>

.header {

  box-sizing: border-box;
  width: 100%;
  height: 70px;
  font-size: 22px;
  color: #fff;
  background-color: #A30014;
}
.collapse-btn {
  float: left;
  padding: 0 21px;
  cursor: pointer;
  line-height: 70px;
}

.header .logo {
  float: left;
  width: 250px;
  line-height: 70px;
}
.header-right {
  float: right;
  padding-right: 50px;
}
.header-user-con {
  display: flex;
  height: 70px;
  align-items: center;
}
.btn-fullscreen {
  transform: rotate(45deg);
  margin-right: 5px;
  font-size: 24px;
}
.btn-bell,
.btn-fullscreen {
  position: relative;
  width: 30px;
  height: 30px;
  text-align: center;
  border-radius: 15px;
  cursor: pointer;
}
.btn-bell-badge {
  position: absolute;
  right: 0;
  top: -2px;
  width: 8px;
  height: 8px;
  border-radius: 4px;
  background: #f56c6c;
  color: #fff;
}
.btn-bell .el-icon-bell {
  color: #fff;
}
.user-name {
  margin-left: 10px;
}
.user-avator {
  margin-left: 20px;
}
.user-avator img {
  display: block;
  width: 40px;
  height: 40px;
  border-radius: 50%;
}
  .user-name img{
  display: block;
  float: left;
  width: 270px;
  height: 70px;

}
.el-dropdown-link {
  color: #fff;
  cursor: pointer;
}
.el-dropdown-menu__item {
  text-align: center;
}
</style>
